I worked for a geologist in Bahrain for a month (contract) back in 2009. He shows oil companies where to dig their holes in the middle-east.

We were walking around Manama with a handful of office towers being build around us and I said in amazement: "This is all because of oil. What are they going to do in a couple hundred years when there is no more"

His reply: "A couple hundred years!? You're going to see the end of oil in the middle-east in your lifetime!"